Nut.



No. 647,699. I Patented Apr. |7, I900.-

A. C. HACHFIELD,

NUT.

(Application filed July 81, 1899.)

(No Model.)

UNITED STATES PATENT OFFICE.

AUGUST 0. HAOHEIELD, or MILWAUKEE, WISCONSIN, ASSIGNOR To nuco 1'1. CASPER, OF SAME PLACE;

SPECIFICATION forming part of Letters Patent Nb. 647,699, dated A ril 17, 1908.

' Application filed July 31,1399. Serial No. 725,629. on than To all whom it may concern:

Be it known that I, AUGUST 0. I-IAOHEIELE, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee and 5 State of Wisconsimhave invent'ed certain new and useful Improvements in Nuts; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention has for its object to prevent 1b automatic loosening of nuts tightened on bolts against opposing surface; also, to avoid abrasion of said surface by nut-corners and to insure tightening of said nuts on deflected bolts without damage to the same. Hence said in- :5 vention consists in a nut having the peculiarity of construction hereinafter particularly set forth with reference to the accompanying drawings and subsequently claimed.

Figure 1 of the drawings represents an elezo vation of my improved nut tightened on a bolt against an opposing surface, and Fig. 2

a partly-sectional plan view on the plane indicated byline 2 2 in the preceding figure.

Referring by letter to the drawings, A in- 25 dicates my improved nut run on a bolt B, that extends through two thicknesses O D of metal or other material. The nut differs from those of ordinary construction in that its working face is beveled in opposite directions from a 30 central line, this line being preferably the greatest diameter of said nut. The nut being tightened on the bolt aforesaid, it will readily seat on the opposing surface, owing to strain against the transverse edge pre- 3 5 sented at its greatest depth in opposite directions from the bolt-aperture, and this seating of said nut secures it against the forces that usually tend to loosen nuts of the ordinary construction. The transverse working-face either direction oh the bolt while in contact with said surface,- and thus abrasion of this surface by nut-corners is avoided;

In case of a deflected bolt my peculiarity of improved nut permits of its automatic in clination to greatest lean of said bolt when tightened thereon against opposing surface, and it has been found by experiment that a nut of the kind herein. set forth tends to ad tomatically tighten on a deflected bolt in'c'i dental to vibration or other causes having a tendency to loosen an ordinary nut under similar conditions.

From the foregoing it will be understood that nuts similar to the one herein set forth automatically compensate for irregularities or inclinations of opposing contact=surfaces and overcome the difficulties usually expo rienced with nuts of the ordinary construc= tion, these nuts of common knowledge being seldom, if ever, true upon their working faces.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. A nut having its Working face beveled in opposite directions from a diameter thereof to thereby form a transverse edge at its greatest depth in opposite directions from its boltaperture.

2. A nut having its working face beveled in opposite directions from its greatest diameter to thereby form a transverse edge at its greatest depth in opposite directions from its boltaperture.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of VVisconsin, in the presence of two witnesses.

A. O. HACHFIELD. 

